1  /* Copyright (C) 2003-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <errno.h>
      19  #include <semaphore.h>
      20  #include <signal.h>
      21  #include <stdio.h>
      22  #include <unistd.h>
      23  
      24  
      25  static void
      26  handler (int sig)
      27  {
      28    struct sigaction sa;
      29  
      30    sa.sa_handler = SIG_DFL;
      31    sa.sa_flags = 0;
      32    sigemptyset (&sa.sa_mask);
      33  
      34    sigaction (SIGALRM, &sa, NULL);
      35  
      36    /* Rearm the timer.  */
      37    alarm (1);
      38  }
      39  
      40  
      41  static int
      42  do_test (void)
      43  {
      44    sem_t s;
      45    struct sigaction sa;
      46  
      47    sa.sa_handler = handler;
      48    sa.sa_flags = 0;
      49    sigemptyset (&sa.sa_mask);
      50  
      51    sigaction (SIGALRM, &sa, NULL);
      52  
      53    if (sem_init (&s, 0, 0) == -1)
      54      {
      55        puts ("init failed");
      56        return 1;
      57      }
      58  
      59    /* Set an alarm for 1 second.  The wrapper will expect this.  */
      60    alarm (1);
      61  
      62    int res = sem_wait (&s);
      63    if (res == 0)
      64      {
      65        puts ("wait succeeded");
      66        return 1;
      67      }
      68    if (res != -1 || errno != EINTR)
      69      {
      70        puts ("wait didn't fail with EINTR");
      71        return 1;
      72      }
      73  
      74    return 0;
      75  }
      76  
      77  #define TEST_FUNCTION do_test ()
      78  #include "../test-skeleton.c"